Construction of Halofunctionalized Indenes via a Cascade Prins‐Nazarov Cyclization Promoted by Dual Roles of BX
<sub>3</sub>
作者:Sabera Sultana、Yong Rok Lee
DOI:10.1002/adsc.201901266
日期:2020.2.21
carboxaldehydes and borontrihalides (BX3, X=F, Cl, Br, I) is described. A diverse array of halofunctionalized indenes substituted with a heterocycle has been synthesized regioselectively with BX3 as a promotor for the carbocyclization and a source of X− for halogenation. This reaction proceeds via a formal halogenative [4+1] cycloaddition between arylalkynes and carboxaldehydes promoted by borontrihalides to generate
Indium(III)-Catalyzed Benzannulation of 3-Formyl-4-pyrones with Terminal Aryl Alkynes: Regioselective Synthesis of Functionalized Salicylaldehydes with <i>ortho</i>-Terphenyl Frameworks
作者:Hari Datta Khanal、Karuna Mahato、Yong Rok Lee
DOI:10.1021/acs.orglett.3c01810
日期:2023.7.28
directly provides aromatic compounds from 4-pyrones. Isotopic substitution experiments suggest that the reaction proceeds via a stepwise sequence involving the addition of an alkyne to the pyran moiety followed by cyclization, oxidation, decarboxylation, and aromatization. The synthetic utility of this protocol is demonstrated by the transformation of the obtained product into molecules with bisindole,
Discovery of Pyrrolopyridine−Pyridone Based Inhibitors of Met Kinase: Synthesis, X-ray Crystallographic Analysis, and Biological Activities
作者:Kyoung Soon Kim、Liping Zhang、Robert Schmidt、Zhen-Wei Cai、Donna Wei、David K. Williams、Louis J. Lombardo、George L. Trainor、Dianlin Xie、Yaquan Zhang、Yongmi An、John S. Sack、John S. Tokarski、Celia Darienzo、Amrita Kamath、Punit Marathe、Yueping Zhang、Jonathan Lippy、Robert Jeyaseelan、Barri Wautlet、Benjamin Henley、Johnni Gullo-Brown、Veeraswamy Manne、John T. Hunt、Joseph Fargnoli、Robert M. Borzilleri
DOI:10.1021/jm800476q
日期:2008.9.11
Conformationally constrained 2-pyridone analogue 2 is a potent Met kinase inhibitor with an IC(50) value of 1.8 nM. Further SAR of the 2-pyridone based inhibitors of Met kinase led to potent 4-pyridone and pyridine N-oxide inhibitors Such as 3 and 4. The X-ray crystallographic data of the inhibitor 2 bound to the ATP binding site of Met kinase protein provided insight into the binding modes of these inhibitors, and the SAR of this series of analogues was rationalized. Many of these analogues showed potent anti proliferative activities against the Met dependent GTL-16 gastric carcinoma cell line. Compound 2 also inhibited Flt-3 and VEGFR-2 kinases with IC(50) values of 4 and 27 nM, respectively. It possesses a favorable pharmacokinetic profile in mice and demonstrates significant in vivo antitumor activity in the GTI-16 human gastric carcinoma xenograft model.